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  <meta charset="UTF-8">
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  <title>Document</title>
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<body>
  <script>
    let arr = [2, 6, 18, 15, 40]
    let newArr = []
    for(let i =0 ; i<arr.length;i++){
      if (arr[i] % 3===0 && arr[i] % 2 ===0){
        newArr.push(arr[i])
      }
    }
    document.write(`能被3整除的偶数有${newArr.length}个
    分别为${newArr}
    `);
  </script>
  
</body>
</html>